高寒地区大跨度构架设计综述

A summary of large-span frame design in alpine region

以太平庄变电站220kV和66kV钢构架为例,针对高寒地区大跨度构架的设计进行了分析与研究.考虑到变电构架的工程特点和高寒地区的特殊工作环境,钢构架结构材料宜选择Q235D或Q345D钢材,并采用冷喷锌技术实现钢构架的长效防腐.经计算对比分析表明,采用三角形格构式梁时,构件受力更为合理,总用钢量较低.此设计方案针对高寒地区大跨度构架工程而提出,充分满足了变电构架的使用要求,实现了全寿命成本的优化.

Taking the 220kV and 66kV steel frame of Taipingzhuang Substation for example,the design of large-span frame in alpine region is analyzed.Considering the project features of the substation frame and the special working environment of the alpine region,the structural material of the steel frame should choose Q235Dor Q345Dsteel;and the cold spraying zinc technology should be adopted to achieve long-term corrosion protection.The comparative analyses show that the mechanical behavior of components is more reasonable if triangular lattice beams are adopted,which making total amount of steel lower.This design scheme is proposed for the large-span frame in alpine region,which fully meets the application requirements of the substation and realizes the optimization of life cycle cost.